| Issue | #21 |
| Published | November 1973 |
| Cover Price | 0.20 USD |
| Pages | 36 |
| Editing | Roy Thomas |
| Characters | Killraven; Carmilla Frost; Grok |
| Genre | Science Fiction |
| Pencils | Herb Trimpe |
| Inks | Herb Trimpe |
| Letters | Gaspar Saladino |
| Reprinted | in Essential Killraven (Marvel, 2005 series) #1 [black & white] |
| Characters | Killraven; M'Shulla; Hawk; Arrow; Old Skull (named in this story); I: Carmilla Frost; Grok; V: Warlord; Martian Master 4; other Martian Masters |
| Genre | Science Fiction |
| Script | Don McGregor |
| Pencils | Herb Trimpe |
| Inks | Yolande Pijcke |
| Colors | Petra Goldberg |
| Letters | Artie Simek |
| Notes | First appearance of Carmilla Frost and Grok. |
| Reprinted | in Essential Killraven (Marvel, 2005 series) #1 [black & white] |